function MakeDropShadow() {
    var node = document;
    var tag = '*';
    var wantedClass = 'dropshadow';

    // Build a regular expression that will search specically for 'wantedClass'
    var pattern = new RegExp("(^|\\s)" + wantedClass + "(\\s|$)");

    // Scan through all tag elements in the document
    var scan_elem = node.getElementsByTagName(tag);
    for (i = 0; i < scan_elem.length; i++) {

        // If element has a class of 'wantedClass'
        if (pattern.test(scan_elem[i].className)) {

            // Get the value from the element
            var text_value = scan_elem[i].innerHTML;

            // Create Shadow Children for this element
            CreateShadowChildren(scan_elem[i], text_value);
        }
    } // End for loop
}

function CreateShadowChildren(shadow_element, shadow_value) {

    var top_pos = .5;
    var left_pos = .5;

    // Assign starting color (in Hex notation) for the Red, Green, and Blue
    // Components (when they all have the same value you will alwys get a gray color).
    // For lighter shadows start with a "lighter" color of 66, 77, 88 99, aa, bb, etc..
    var starting_color = '00';
    var cRed = parseInt(starting_color, 'FF');
    var cGreen = parseInt(starting_color, 'FF');
    var cBlue = parseInt(starting_color, 'FF');

    // Set the max number of shadow elements to create.
    // This should never be set larger than the Z-Index value of dropshadow class
    var max_shadows = 3.5;

    // Calculate color increament based on range of gray colors (from starting_color to
    // the lighest gray color of #fefefe) and max number of shadows you want
    var color_inc = parseInt((parseInt('fe', '16') - parseInt(starting_color, '16')) / max_shadows, '10');

    for (j = 1; j <= max_shadows; j++) {

        // Build full color Hex string from it's individual RGB values
        var full_color_value = cRed.toString(16) + cGreen.toString(16) + cBlue.toString(16);

        // Create a Shadow DIV
        var shadow_div = document.createElement('div');

        //  Add the shadow_value to Shadow DIV
        shadow_div.innerHTML = shadow_value;

        // Style Shadow DIV
        shadow_div.style.width = shadow_element.offsetWidth + "px";
        shadow_div.style.color = '#' + full_color_value;
        shadow_div.style.borderColor = '#' + full_color_value;
        shadow_div.style.display = "block";
        shadow_div.style.position = "absolute";
        shadow_div.style.top = top_pos + "px";
        shadow_div.style.left = left_pos + "px";
        shadow_div.style.zIndex = (-1) * j;

        // Apppend Shadow DIV to shadow element
        shadow_element.appendChild(shadow_div);

        // Increment positons and shadows individual RGB color values
        top_pos += .5;
        left_pos += .5;
        cRed += color_inc;
        cGreen += color_inc;
        cBlue += color_inc;
    }

}

// Run the MakeDropShadow function when the page finishes loading
window.onload = MakeDropShadow;